JEE Main 2023PhysicsElectromagnetic WavesEm SpectrumeasyMCQ

JEE Main 2023 — Electromagnetic Waves Question with Solution

From: JEE Main 2023 (Online) 12th April Morning Shift

Question

Given below are two statements: one is labelled as Assertion and the other is labelled as Reason

Assertion A : EM waves used for optical communication have longer wavelengths than that of microwave, employed in Radar technology.

Reason R : Infrared EM waves are more energetic than microwaves, (used in Radar)

In the light of given statements, choose the correct answer from the options given below.

Choose an option

Show full solutionCorrect option: D
Correct answer
D is false but is true

Step-by-step explanation

Optical communication is performed in the frequency range of to . (Microwave to UV)

So, EM waves used for optical communication have shorter wavelength than that of microwaves used in RADAR.

Also,

Infrared EM waves are more energetic than microwave

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About this question

This is a previous-year question from JEE Main 2023, covering the Electromagnetic Waves chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.